Fuel atomizer



May 3l, 1927.

W. STEVENSON FUEL ATOMIZER Filed Jan. 50, 1925 h( fet/6275011 any si, 1927.

are. -s'fr WILLIAM srnvnivsoiv, orjnUivEDiN orario, NEW ziiaiiiinii.V

Application filed January-30, 1925. Serial No. 57,833.

This invention relates to motor accessories designed tor the purpose of endeavouring to enter the fuel into the mixing ,chamber in more or less a spray form, and is particularly adapted for'ir-:e in combination with'needleV valves of the types used in what are knownas the Holly or Kingston carburettors,

The object of the invention is to cause the fuely issuing from the nozzle ot the carbui'ettor to spray, and in a certain measure i ternal thread in the atomizer, so that the two parts might be connected.

The atomizer is tubular, having-its bore provided with a smooth surface andof a diameter equal to the diameter of the stem of the needle valve, So as not to interfere with the functioning thereof. The outside of -the said ato-mizer has a ridged surface which is tapered, decreasing in diameter from the lower end of the ridge `leaving `the edge in a measure sharp. Therevis a bell like extension at the'lower end, 'and it is atl this point that the atomizer is connected with the nozzle.

Vvhen permitted by the adjustment of the needle valve, Jdie fuel supply through the nozzle is induced through perforations in the 4bell like extension, and dur-ing the pas# sage of the fuel from the nozzle tothe mixing chamber in Vthe Carburettor, a breaking up oi'. Separating process of the fuel takes place. The mixture thus formed passes to the cylinder', and being susceptible to ignition, renders the starting of the engine much easierand more ,tiexible t Referring to the accompanying drawings, Figure l is apart sectional elevation of the Holly carburettor,'showingthe application of my invention. y

FigureQ is an enlarged view of portion of Figure l, showing the atomizer in section, and a portion of the nozzleV and needle valve. Figure 3 is an elevation of thevatomizer. Referring to Figure l, a portion of the tio-at chanibeiis indicated latl, the fuel inlet is shown at 2, nozzle at 3, and the stem Il of the needle valve et?. The said valve is adapted to be adjusted to engage with the 'nozzle to increase, reduce orclose the nozzley altogether. For this lpurpose there is a screw threaded portion 4B, which coincides .with tlielthreadedA portion 5 in the body part of the cai'biirett-or, and isprovidedvvith a head t@ adapted to engage with a connecting rod (not shown in the drawings) eX-1 'i tending from the dash, or in close proximity to the driver.

According to my invention Irsupply an i 'A atomizer 6, which consists 0f a tubular mem-` ber Vhaving its bore 6* provided with a smooth surface to coincide'withjthe diameter of the stem' 4 of the needle valve 4A, the said vstem is slidable therein for adjustment, so

that `its .point may engage Witlithe nozzle 3. The outer surface of the atomizer is roughened, preferably inthe form indicatedin. the

drawings, which consists of a series of ridges y 6B; these ridges aie characterized by being'.

bevelle'd or tapered.' This construction forms in measure sharp edges as indicated at 6C;`

the diameter at the point 6C is the largestV vdiameter part of the atomizer 6, the saidfdiaineter being-governed by the diameter of the channel 7 in which the atomizer 6AV is vhoused at an appreciable easy lit. TheA lower ,p`art`6lD ofthe said atomizer 6 is peculiarly fashioned,.and is preferably of the form in-l dicated in the drawings. The internal diameter 6E `coincides with the diameter of Y lilling up the channel 7 between the said nozv zle andthe mixing chamber 8, leaving only ripheral surface ofthe channel 7 the lower member 6 beingperforated as at 6G, andthe `fuel entering the nozzle in the float chamber through the inlet 3 is induced, when the needle valve is ad]usted to permit it, through the said perforations 6G, issuing therefrom in a much finer Jet along vanishing grooves l6H and directed against the edge 6C, and playing upon each successive edge until the y fuel reaches the mixing chamber 8.

i 10o,l a tine annularv space ybetween the larger diameter part of the ridges andthe inner pe-V VVh'at I claim as. new and desire to secure by yLetters Patent is l. In adeviee of the Character described, in combination,l a mixing Chamber7 a chanh nel leading to the mixing cha'niber, a nozzle-V proj ectng into the lower end of the elijan-nel, a needle valve pro]eet1ng downwardly into the channel and coacting with the nozzle, a

its point of connection with the nozzle provided with openings and also having a .serine of Superposedannula-r ridges formed onY its Vber;

outer surface for'cooperating with the vsurrounding Wall of the Channel-Ato break up and Aatoinize the fuel as it passes through the channel y 2. AnarrangeinentI Vas Claimed in claim wherein the ridges inthe tubular atomizerV are provided with lower flat faces while the outer surfaces taper inwardly, and the lower edges being arranged iii-closely spaced relation to the surrounding wall of the channel7 .substantially as-and for the purposes set forth. 4 Y

In testimony whereof affix my signature.

WILLIAM STEVENSQN,

prior to entering the mixing chaln- 

